Machine for manufacturing hollow rotary elements from circular blanks of sheet metal



Feb. 7, 1933. Q SCHMlDT 1,896,426

MACHINE FOR MANUFACTURING HOLLOW ROTARY ELEMENTS FROM CIRCULAR BLANKS OF SHEET METAL Original Filed June v27, 1927 Patented Feb. 7, 1.933

CARL SCHMIDT, OF BAERL, GERMANY n 'i MACHINE ron MANUFACTURING HOLLOWV RotrAnYnLnMENrs FROM cncULAn BLANES oF SHEET-METAL K Original application filed `Tune 27, 1927, Serial No. 201,850,V and in' Germany July '5,19262 Divided andths vapplication filed September 24, 1930. SerialiNo.'l 484,201'.

My invention relates to a machine for :manufacturing hollow rotary elements fromcircular blanks of sheet metal, merely by free To this end, I provide rotary means for holding a circular blank at its centre only, rotary rolling tools having edges adapted to rotate the blankb enaoinv its unsupported y y Y.

y o b n fhavinga table or bed 26, 1 is a slidefwhich yis mountedto move Vverticallyfin a guide of portion, means for rotating the tools, and means for eiiecting relative axial. displace- J' mentof the tools and the blank.

In a preferred embodiment of my machine I provide a slide, which is adapted to be d1splaced, a shaftwhich is mounted to rotate on the slide and is adapted to hold the blank `at its centre, and arrange my tools at opposite sides of the slide which are adapted to be displaced at right angles to the 'motion of the first-mentioned slide. These lateral slides support rolling tools which are rotated in the same direction. The axes of the rolling tools are parallel to the axis of the blank.. I may also arrange the first-mentioned sllde 1n a Vfixed position and so arrange to the two lateral slides with the rolling tools that they are displaced in parallel to the axis of the blank as well as at right angles thereto. The rolling operation is the same in both cases, The

machine rolls the blank into a rotary hollow element without a mandrel, as will be described below. f

It has already been proposed to roll shapes from sheet metal by means of Vrolls anda mandrel and to arrange the axes of the rolls and the mandrel parallel to each other, and to the axis of the shape but machines of this type are spinning and ianging machines in which the mandrel which I have eliminated, is indispensible. impracticable the manufacture of hollow shapes which are narrower at the top than at the bottom.

My machine has the advantage of extreme simplicity and reliability.

In the accompanying drawing a machine respect tothe iirst s The mandrel also renders embodying my invention is illustrated grammatically by wayk of example". In the drawing Fig. lis a partly sectional elevation ofmy machine showing the position/ofits parts in;v

one of its initial sta es, t 2,

i Fig. 2 is a details owing the blank andthe spinning tools in the finishing stage,

.Figs 3 and 4 are a plan View and an elevation, respectively, in section on the lines fIII-i-III and IV-IVin Fig. 1.

Referring now tothe drawing, 25 isa frame V theY frame and maybe actuated by any suitlines at 2.l in Fig. 1.'V This blank is secured only' is'supported. f 5, 5 are slides whichare mounted in guides of theta'ble or `bed 26 and are adapted to be displaced horizontally with g ide 1 in opposite directions, each slide supporting a shaft 3 with a spur gear, a sprocket, a pulley or the like 24 by which the shaft is rotated, and a rolling tool 7 having a circular edge 7 which is preferably rounded. The shafts 3 are rotated inthe same direction.

on thel shaft 27 byV any suitable chucking means, not shown, so that its centralportion A flat circular blank 2 is chucked on the shaft 27 and the edges 7 of the tools 7 are arranged above the blank, about at 8, Fig. 1, at the beginning of the operation. The shafts 3v are now rotated as indicated by the arrows Fig. 1 while at the same time the slides 5, 5 are moved in the direction of arrows `6and the slide 1 is raised in the direc-ftion of arrow 9. Fig. 1 shows the begin- It will be understood that shapes of various kinds may be obtained by suitably determining the relative velocities at which the slide l and the slides 5, are displaced. It

5 is also possible to vary the direction and the velocity of the motion of the slides 5, 5 during the operation so that shapes of a greatl f variety may be made. A 1

I am not limited to two tools 7 but may pro- 10' vide any number of tools, but there must not be less than two. Nor am I limitedto tools which are xed in axial direction in combination with a movable slide but mayy provide the reversed arrangement of parts, as men. tioned.

I claim: l

l. A machine for spinning. cups from cir- `cular blanks of sheet metal, 'comprising a slide, means on said slide for holding a blank at its centre only, so as to roti-ate freely, slides adapted to be displaced transversely With respect to said rst-mentioned slide,'a shaft on each oi. said last mentioned slides, and roll- I i 'ing tools on said shafts having edges adapted to shape the blank freely into a hollow shape. 2. A machinel for spinning cups from circular blanks comprising .a blank supporting Vslide including clamping members rotatable Ain the slide for clamping the respective sides of'the'central portion of a blank so as to leave the outer portion thereof free, reciprocating lslides arranged on opposite sides of the first slide, shafts rotatably mounted in said latter slides and arranged in parallelisnr'with the axis ofthe clamping members, means for rotaining said shafts in the same direction, and tools carried by said shafts for engaging Ydiametrically opposite sides of thefree portion'of the blank. f

"40 In' testimony whereof I ailix my signature. y

vCARL sorIMIDT.y 

